diff options
Diffstat (limited to 'ffmpeg/libavcodec/tiff.c')
| -rw-r--r-- | ffmpeg/libavcodec/tiff.c | 1237 |
1 files changed, 1237 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/tiff.c b/ffmpeg/libavcodec/tiff.c new file mode 100644 index 0000000..6c2dc23 --- /dev/null +++ b/ffmpeg/libavcodec/tiff.c @@ -0,0 +1,1237 @@ +/* + * Copyright (c) 2006 Konstantin Shishkov + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * TIFF image decoder + * @author Konstantin Shishkov + */ + +#include "avcodec.h" +#include "bytestream.h" +#include "config.h" +#if CONFIG_ZLIB +#include <zlib.h> +#endif +#include "lzw.h" +#include "tiff.h" +#include "tiff_data.h" +#include "faxcompr.h" +#include "internal.h" +#include "mathops.h" +#include "libavutil/attributes.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/imgutils.h" +#include "libavutil/avstring.h" + +typedef struct TiffContext { + AVCodecContext *avctx; + GetByteContext gb; + + int width, height; + unsigned int bpp, bppcount; + uint32_t palette[256]; + int palette_is_set; + int le; + enum TiffCompr compr; + int invert; + int fax_opts; + int predictor; + int fill_order; + + int strips, rps, sstype; + int sot; + int stripsizesoff, stripsize, stripoff, strippos; + LZWState *lzw; + + uint8_t *deinvert_buf; + int deinvert_buf_size; + + int geotag_count; + TiffGeoTag *geotags; +} TiffContext; + +static unsigned tget_short(GetByteContext *gb, int le) +{ + unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb); + return v; +} + +static unsigned tget_long(GetByteContext *gb, int le) +{ + unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb); + return v; +} + +static double tget_double(GetByteContext *gb, int le) +{ + av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)}; + return i.f64; +} + +static unsigned tget(GetByteContext *gb, int type, int le) +{ + switch (type) { + case TIFF_BYTE : return bytestream2_get_byte(gb); + case TIFF_SHORT: return tget_short(gb, le); + case TIFF_LONG : return tget_long(gb, le); + default : return UINT_MAX; + } +} + +static void free_geotags(TiffContext *const s) +{ + int i; + for (i = 0; i < s->geotag_count; i++) { + if (s->geotags[i].val) + av_freep(&s->geotags[i].val); + } + av_freep(&s->geotags); +} + +#define RET_GEOKEY(TYPE, array, element)\ + if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\ + key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\ + return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element; + +static const char *get_geokey_name(int key) +{ + RET_GEOKEY(VERT, vert, name); + RET_GEOKEY(PROJ, proj, name); + RET_GEOKEY(GEOG, geog, name); + RET_GEOKEY(CONF, conf, name); + + return NULL; +} + +static int get_geokey_type(int key) +{ + RET_GEOKEY(VERT, vert, type); + RET_GEOKEY(PROJ, proj, type); + RET_GEOKEY(GEOG, geog, type); + RET_GEOKEY(CONF, conf, type); + + return AVERROR_INVALIDDATA; +} + +static int cmp_id_key(const void *id, const void *k) +{ + return *(const int*)id - ((const TiffGeoTagKeyName*)k)->key; +} + +static const char *search_keyval(const TiffGeoTagKeyName *keys, int n, int id) +{ + TiffGeoTagKeyName *r = bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key); + if(r) + return r->name; + + return NULL; +} + +static char *get_geokey_val(int key, int val) +{ + char *ap; + + if (val == TIFF_GEO_KEY_UNDEFINED) + return av_strdup("undefined"); + if (val == TIFF_GEO_KEY_USER_DEFINED) + return av_strdup("User-Defined"); + +#define RET_GEOKEY_VAL(TYPE, array)\ + if (val >= TIFF_##TYPE##_OFFSET &&\ + val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\ + return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]); + + switch (key) { + case TIFF_GT_MODEL_TYPE_GEOKEY: + RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type); + break; + case TIFF_GT_RASTER_TYPE_GEOKEY: + RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type); + break; + case TIFF_GEOG_LINEAR_UNITS_GEOKEY: + case TIFF_PROJ_LINEAR_UNITS_GEOKEY: + case TIFF_VERTICAL_UNITS_GEOKEY: + RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit); + break; + case TIFF_GEOG_ANGULAR_UNITS_GEOKEY: + case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY: + RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit); + break; + case TIFF_GEOGRAPHIC_TYPE_GEOKEY: + RET_GEOKEY_VAL(GCS_TYPE, gcs_type); + RET_GEOKEY_VAL(GCSE_TYPE, gcse_type); + break; + case TIFF_GEOG_GEODETIC_DATUM_GEOKEY: + RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum); + RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e); + break; + case TIFF_GEOG_ELLIPSOID_GEOKEY: + RET_GEOKEY_VAL(ELLIPSOID, ellipsoid); + break; + case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY: + RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian); + break; + case TIFF_PROJECTED_CS_TYPE_GEOKEY: + ap = av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val)); + if(ap) return ap; + break; + case TIFF_PROJECTION_GEOKEY: + ap = av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val)); + if(ap) return ap; + break; + case TIFF_PROJ_COORD_TRANS_GEOKEY: + RET_GEOKEY_VAL(COORD_TRANS, coord_trans); + break; + case TIFF_VERTICAL_CS_TYPE_GEOKEY: + RET_GEOKEY_VAL(VERT_CS, vert_cs); + RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs); + break; + + } + + ap = av_malloc(14); + if (ap) + snprintf(ap, 14, "Unknown-%d", val); + return ap; +} + +static char *doubles2str(double *dp, int count, const char *sep) +{ + int i; + char *ap, *ap0; + uint64_t component_len; + if (!sep) sep = ", "; + component_len = 15LL + strlen(sep); + if (count >= (INT_MAX - 1)/component_len) + return NULL; + ap = av_malloc(component_len * count + 1); + if (!ap) + return NULL; + ap0 = ap; + ap[0] = '\0'; + for (i = 0; i < count; i++) { + unsigned l = snprintf(ap, component_len, "%f%s", dp[i], sep); + if(l >= component_len) { + av_free(ap0); + return NULL; + } + ap += l; + } + ap0[strlen(ap0) - strlen(sep)] = '\0'; + return ap0; +} + +static char *shorts2str(int16_t *sp, int count, const char *sep) +{ + int i; + char *ap, *ap0; + uint64_t component_len; + if (!sep) sep = ", "; + component_len = 7LL + strlen(sep); + if (count >= (INT_MAX - 1)/component_len) + return NULL; + ap = av_malloc(component_len * count + 1); + if (!ap) + return NULL; + ap0 = ap; + ap[0] = '\0'; + for (i = 0; i < count; i++) { + unsigned l = snprintf(ap, component_len, "%d%s", sp[i], sep); + if (l >= component_len) { + av_free(ap0); + return NULL; + } + ap += l; + } + ap0[strlen(ap0) - strlen(sep)] = '\0'; + return ap0; +} + +static int add_doubles_metadata(int count, + const char *name, const char *sep, + TiffContext *s, AVFrame *frame) +{ + char *ap; + int i; + double *dp; + + if (count >= INT_MAX / sizeof(int64_t) || count <= 0) + return AVERROR_INVALIDDATA; + if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t)) + return AVERROR_INVALIDDATA; + + dp = av_malloc(count * sizeof(double)); + if (!dp) + return AVERROR(ENOMEM); + + for (i = 0; i < count; i++) + dp[i] = tget_double(&s->gb, s->le); + ap = doubles2str(dp, count, sep); + av_freep(&dp); + if (!ap) + return AVERROR(ENOMEM); + av_dict_set(avpriv_frame_get_metadatap(frame), name, ap, AV_DICT_DONT_STRDUP_VAL); + return 0; +} + +static int add_shorts_metadata(int count, const char *name, + const char *sep, TiffContext *s, AVFrame *frame) +{ + char *ap; + int i; + int16_t *sp; + + if (count >= INT_MAX / sizeof(int16_t) || count <= 0) + return AVERROR_INVALIDDATA; + if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int16_t)) + return AVERROR_INVALIDDATA; + + sp = av_malloc(count * sizeof(int16_t)); + if (!sp) + return AVERROR(ENOMEM); + + for (i = 0; i < count; i++) + sp[i] = tget_short(&s->gb, s->le); + ap = shorts2str(sp, count, sep); + av_freep(&sp); + if (!ap) + return AVERROR(ENOMEM); + av_dict_set(avpriv_frame_get_metadatap(frame), name, ap, AV_DICT_DONT_STRDUP_VAL); + return 0; +} + +static int add_string_metadata(int count, const char *name, + TiffContext *s, AVFrame *frame) +{ + char *value; + + if (bytestream2_get_bytes_left(&s->gb) < count || count < 0) + return AVERROR_INVALIDDATA; + + value = av_malloc(count + 1); + if (!value) + return AVERROR(ENOMEM); + + bytestream2_get_bufferu(&s->gb, value, count); + value[count] = 0; + + av_dict_set(avpriv_frame_get_metadatap(frame), name, value, AV_DICT_DONT_STRDUP_VAL); + return 0; +} + +static int add_metadata(int count, int type, + const char *name, const char *sep, TiffContext *s, AVFrame *frame) +{ + switch(type) { + case TIFF_DOUBLE: return add_doubles_metadata(count, name, sep, s, frame); + case TIFF_SHORT : return add_shorts_metadata(count, name, sep, s, frame); + case TIFF_STRING: return add_string_metadata(count, name, s, frame); + default : return AVERROR_INVALIDDATA; + }; +} + +#if CONFIG_ZLIB +static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, + int size) +{ + z_stream zstream = { 0 }; + int zret; + + zstream.next_in = (uint8_t *)src; + zstream.avail_in = size; + zstream.next_out = dst; + zstream.avail_out = *len; + zret = inflateInit(&zstream); + if (zret != Z_OK) { + av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret); + return zret; + } + zret = inflate(&zstream, Z_SYNC_FLUSH); + inflateEnd(&zstream); + *len = zstream.total_out; + return zret == Z_STREAM_END ? Z_OK : zret; +} +#endif + +static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst, + int usePtr, const uint8_t *src, + uint8_t c, int width, int offset) +{ + switch (bpp) { + case 1: + while (--width >= 0) { + dst[(width+offset)*8+7] = (usePtr ? src[width] : c) & 0x1; + dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1; + dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1; + dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1; + dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1; + dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1; + dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1; + dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7; + } + break; + case 2: + while (--width >= 0) { + dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3; + dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3; + dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3; + dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6; + } + break; + case 4: + while (--width >= 0) { + dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF; + dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4; + } + break; + default: + if (usePtr) { + memcpy(dst + offset, src, width); + } else { + memset(dst + offset, c, width); + } + } +} + +static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, + const uint8_t *src, int size, int lines) +{ + int c, line, pixels, code, ret; + const uint8_t *ssrc = src; + int width = ((s->width * s->bpp) + 7) >> 3; + + if (size <= 0) + return AVERROR_INVALIDDATA; + +#if CONFIG_ZLIB + if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) { + uint8_t *src2 = NULL, *zbuf; + unsigned long outlen; + int i, ret; + outlen = width * lines; + zbuf = av_malloc(outlen); + if (!zbuf) + return AVERROR(ENOMEM); + if (s->fill_order) { + src2 = av_malloc((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!src2) { + av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n"); + av_free(zbuf); + return AVERROR(ENOMEM); + } + for (i = 0; i < size; i++) + src2[i] = ff_reverse[src[i]]; + memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + src = src2; + } + ret = tiff_uncompress(zbuf, &outlen, src, size); + if (ret != Z_OK) { + av_log(s->avctx, AV_LOG_ERROR, + "Uncompressing failed (%lu of %lu) with error %d\n", outlen, + (unsigned long)width * lines, ret); + av_free(src2); + av_free(zbuf); + return AVERROR_UNKNOWN; + } + src = zbuf; + for (line = 0; line < lines; line++) { + if(s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8){ + horizontal_fill(s->bpp, dst, 1, src, 0, width, 0); + }else{ + memcpy(dst, src, width); + } + dst += stride; + src += width; + } + av_free(src2); + av_free(zbuf); + return 0; + } +#endif + if (s->compr == TIFF_LZW) { + if (s->fill_order) { + int i; + av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size); + if (!s->deinvert_buf) + return AVERROR(ENOMEM); + for (i = 0; i < size; i++) + s->deinvert_buf[i] = ff_reverse[src[i]]; + src = s->deinvert_buf; + ssrc = src; + } + if (size > 1 && !src[0] && (src[1]&1)) { + av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n"); + } + if ((ret = ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF)) < 0) { + av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n"); + return ret; + } + } + if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3 + || s->compr == TIFF_G4) { + int i, ret = 0; + uint8_t *src2 = av_malloc((unsigned)size + + FF_INPUT_BUFFER_PADDING_SIZE); + + if (!src2) { + av_log(s->avctx, AV_LOG_ERROR, + "Error allocating temporary buffer\n"); + return AVERROR(ENOMEM); + } + if (s->fax_opts & 2) { + av_log(s->avctx, AV_LOG_ERROR, + "Uncompressed fax mode is not supported (yet)\n"); + av_free(src2); + return AVERROR_INVALIDDATA; + } + if (!s->fill_order) { + memcpy(src2, src, size); + } else { + for (i = 0; i < size; i++) + src2[i] = ff_reverse[src[i]]; + } + memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + switch (s->compr) { + case TIFF_CCITT_RLE: + case TIFF_G3: + case TIFF_G4: + ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride, + s->compr, s->fax_opts); + break; + } + if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8) + for (line = 0; line < lines; line++) { + horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0); + dst += stride; + } + av_free(src2); + return ret; + } + for (line = 0; line < lines; line++) { + if (src - ssrc > size) { + av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n"); + return AVERROR_INVALIDDATA; + } + switch (s->compr) { + case TIFF_RAW: + if (ssrc + size - src < width) + return AVERROR_INVALIDDATA; + if (!s->fill_order) { + horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8), + dst, 1, src, 0, width, 0); + } else { + int i; + for (i = 0; i < width; i++) + dst[i] = ff_reverse[src[i]]; + } + src += width; + break; + case TIFF_PACKBITS: + for (pixels = 0; pixels < width;) { + if (ssrc + size - src < 2) { + av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n"); + return AVERROR_INVALIDDATA; + } + code = (int8_t) * src++; + if (code >= 0) { + code++; + if (pixels + code > width) { + av_log(s->avctx, AV_LOG_ERROR, + "Copy went out of bounds\n"); + return AVERROR_INVALIDDATA; + } + if (ssrc + size - src < code) { + av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n"); + return AVERROR_INVALIDDATA; + } + horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8), + dst, 1, src, 0, code, pixels); + src += code; + pixels += code; + } else if (code != -128) { // -127..-1 + code = (-code) + 1; + if (pixels + code > width) { + av_log(s->avctx, AV_LOG_ERROR, + "Run went out of bounds\n"); + return AVERROR_INVALIDDATA; + } + c = *src++; + horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8), + dst, 0, NULL, c, code, pixels); + pixels += code; + } + } + break; + case TIFF_LZW: + pixels = ff_lzw_decode(s->lzw, dst, width); + if (pixels < width) { + av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n", + pixels, width); + return AVERROR_INVALIDDATA; + } + if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8) + horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0); + break; + } + dst += stride; + } + return 0; +} + +static int init_image(TiffContext *s, AVFrame *frame) +{ + int i, ret; + uint32_t *pal; + + switch (s->bpp * 10 + s->bppcount) { + case 11: + if (!s->palette_is_set) { + s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; + break; + } + case 21: + case 41: + case 81: + s->avctx->pix_fmt = AV_PIX_FMT_PAL8; + break; + case 243: + s->avctx->pix_fmt = AV_PIX_FMT_RGB24; + break; + case 161: + s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE; + break; + case 162: + s->avctx->pix_fmt = AV_PIX_FMT_GRAY8A; + break; + case 324: + s->avctx->pix_fmt = AV_PIX_FMT_RGBA; + break; + case 483: + s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE; + break; + case 644: + s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE; + break; + default: + av_log(s->avctx, AV_LOG_ERROR, + "This format is not supported (bpp=%d, bppcount=%d)\n", + s->bpp, s->bppcount); + return AVERROR_INVALIDDATA; + } + if (s->width != s->avctx->width || s->height != s->avctx->height) { + if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0) + return ret; + avcodec_set_dimensions(s->avctx, s->width, s->height); + } + if ((ret = ff_get_buffer(s->avctx, frame, 0)) < 0) + return ret; + if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) { + if (s->palette_is_set) { + memcpy(frame->data[1], s->palette, sizeof(s->palette)); + } else { + /* make default grayscale pal */ + pal = (uint32_t *) frame->data[1]; + for (i = 0; i < 1<<s->bpp; i++) + pal[i] = 0xFFU << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101; + } + } + return 0; +} + +static int tiff_decode_tag(TiffContext *s, AVFrame *frame) +{ + unsigned tag, type, count, off, value = 0; + int i, j, k, pos, start; + int ret; + uint32_t *pal; + double *dp; + + tag = tget_short(&s->gb, s->le); + type = tget_short(&s->gb, s->le); + count = tget_long(&s->gb, s->le); + off = tget_long(&s->gb, s->le); + start = bytestream2_tell(&s->gb); + + if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) { + av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n", + type); + return 0; + } + + if (count == 1) { + switch (type) { + case TIFF_BYTE: + case TIFF_SHORT: + bytestream2_seek(&s->gb, -4, SEEK_CUR); + value = tget(&s->gb, type, s->le); + break; + case TIFF_LONG: + value = off; + break; + case TIFF_STRING: + if (count <= 4) { + bytestream2_seek(&s->gb, -4, SEEK_CUR); + break; + } + default: + value = UINT_MAX; + bytestream2_seek(&s->gb, off, SEEK_SET); + } + } else { + if (count <= 4 && type_sizes[type] * count <= 4) { + bytestream2_seek(&s->gb, -4, SEEK_CUR); + } else { + bytestream2_seek(&s->gb, off, SEEK_SET); + } + } + + switch (tag) { + case TIFF_WIDTH: + s->width = value; + break; + case TIFF_HEIGHT: + s->height = value; + break; + case TIFF_BPP: + s->bppcount = count; + if (count > 4) { + av_log(s->avctx, AV_LOG_ERROR, + "This format is not supported (bpp=%d, %d components)\n", + s->bpp, count); + return AVERROR_INVALIDDATA; + } + if (count == 1) + s->bpp = value; + else { + switch (type) { + case TIFF_BYTE: + s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) + + ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF); + break; + case TIFF_SHORT: + case TIFF_LONG: + s->bpp = 0; + if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count) + return AVERROR_INVALIDDATA; + for (i = 0; i < count; i++) + s->bpp += tget(&s->gb, type, s->le); + break; + default: + s->bpp = -1; + } + } + break; + case TIFF_SAMPLES_PER_PIXEL: + if (count != 1) { + av_log(s->avctx, AV_LOG_ERROR, + "Samples per pixel requires a single value, many provided\n"); + return AVERROR_INVALIDDATA; + } + if (value > 4U) { + av_log(s->avctx, AV_LOG_ERROR, + "Samples per pixel %d is too large\n", value); + return AVERROR_INVALIDDATA; + } + if (s->bppcount == 1) + s->bpp *= value; + s->bppcount = value; + break; + case TIFF_COMPR: + s->compr = value; + s->predictor = 0; + switch (s->compr) { + case TIFF_RAW: + case TIFF_PACKBITS: + case TIFF_LZW: + case TIFF_CCITT_RLE: + break; + case TIFF_G3: + case TIFF_G4: + s->fax_opts = 0; + break; + case TIFF_DEFLATE: + case TIFF_ADOBE_DEFLATE: +#if CONFIG_ZLIB + break; +#else + av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n"); + return AVERROR(ENOSYS); +#endif + case TIFF_JPEG: + case TIFF_NEWJPEG: + av_log(s->avctx, AV_LOG_ERROR, + "JPEG compression is not supported\n"); + return AVERROR_PATCHWELCOME; + default: + av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n", + s->compr); + return AVERROR_INVALIDDATA; + } + break; + case TIFF_ROWSPERSTRIP: + if (type == TIFF_LONG && value == UINT_MAX) + value = s->height; + if (value < 1) { + av_log(s->avctx, AV_LOG_ERROR, + "Incorrect value of rows per strip\n"); + return AVERROR_INVALIDDATA; + } + s->rps = value; + break; + case TIFF_STRIP_OFFS: + if (count == 1) { + s->strippos = 0; + s->stripoff = value; + } else + s->strippos = off; + s->strips = count; + if (s->strips == 1) + s->rps = s->height; + s->sot = type; + if (s->strippos > bytestream2_size(&s->gb)) { + av_log(s->avctx, AV_LOG_ERROR, + "Tag referencing position outside the image\n"); + return AVERROR_INVALIDDATA; + } + break; + case TIFF_STRIP_SIZE: + if (count == 1) { + s->stripsizesoff = 0; + s->stripsize = value; + s->strips = 1; + } else { + s->stripsizesoff = off; + } + s->strips = count; + s->sstype = type; + if (s->stripsizesoff > bytestream2_size(&s->gb)) { + av_log(s->avctx, AV_LOG_ERROR, + "Tag referencing position outside the image\n"); + return AVERROR_INVALIDDATA; + } + break; + case TIFF_TILE_BYTE_COUNTS: + case TIFF_TILE_LENGTH: + case TIFF_TILE_OFFSETS: + case TIFF_TILE_WIDTH: + av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n"); + return AVERROR_PATCHWELCOME; + break; + case TIFF_PREDICTOR: + s->predictor = value; + break; + case TIFF_INVERT: + switch (value) { + case 0: + s->invert = 1; + break; + case 1: + s->invert = 0; + break; + case 2: + case 3: + break; + default: + av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n", + value); + return AVERROR_INVALIDDATA; + } + break; + case TIFF_FILL_ORDER: + if (value < 1 || value > 2) { + av_log(s->avctx, AV_LOG_ERROR, + "Unknown FillOrder value %d, trying default one\n", value); + value = 1; + } + s->fill_order = value - 1; + break; + case TIFF_PAL: + pal = (uint32_t *) s->palette; + off = type_sizes[type]; + if (count / 3 > 256 || bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3) + return AVERROR_INVALIDDATA; + off = (type_sizes[type] - 1) << 3; + for (k = 2; k >= 0; k--) { + for (i = 0; i < count / 3; i++) { + if (k == 2) + pal[i] = 0xFFU << 24; + j = (tget(&s->gb, type, s->le) >> off) << (k * 8); + pal[i] |= j; + } + } + s->palette_is_set = 1; + break; + case TIFF_PLANAR: + if (value == 2) { + av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n"); + return AVERROR_PATCHWELCOME; + } + break; + case TIFF_T4OPTIONS: + if (s->compr == TIFF_G3) + s->fax_opts = value; + break; + case TIFF_T6OPTIONS: + if (s->compr == TIFF_G4) + s->fax_opts = value; + break; +#define ADD_METADATA(count, name, sep)\ + if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\ + av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\ + return ret;\ + } + case TIFF_MODEL_PIXEL_SCALE: + ADD_METADATA(count, "ModelPixelScaleTag", NULL); + break; + case TIFF_MODEL_TRANSFORMATION: + ADD_METADATA(count, "ModelTransformationTag", NULL); + break; + case TIFF_MODEL_TIEPOINT: + ADD_METADATA(count, "ModelTiepointTag", NULL); + break; + case TIFF_GEO_KEY_DIRECTORY: + ADD_METADATA(1, "GeoTIFF_Version", NULL); + ADD_METADATA(2, "GeoTIFF_Key_Revision", "."); + s->geotag_count = tget_short(&s->gb, s->le); + if (s->geotag_count > count / 4 - 1) { + s->geotag_count = count / 4 - 1; + av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n"); + } + if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4) { + s->geotag_count = 0; + return -1; + } + s->geotags = av_mallocz(sizeof(TiffGeoTag) * s->geotag_count); + if (!s->geotags) { + av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n"); + s->geotag_count = 0; + return AVERROR(ENOMEM); + } + for (i = 0; i < s->geotag_count; i++) { + s->geotags[i].key = tget_short(&s->gb, s->le); + s->geotags[i].type = tget_short(&s->gb, s->le); + s->geotags[i].count = tget_short(&s->gb, s->le); + + if (!s->geotags[i].type) + s->geotags[i].val = get_geokey_val(s->geotags[i].key, tget_short(&s->gb, s->le)); + else + s->geotags[i].offset = tget_short(&s->gb, s->le); + } + break; + case TIFF_GEO_DOUBLE_PARAMS: + if (count >= INT_MAX / sizeof(int64_t)) + return AVERROR_INVALIDDATA; + if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t)) + return AVERROR_INVALIDDATA; + dp = av_malloc(count * sizeof(double)); + if (!dp) { + av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n"); + return AVERROR(ENOMEM); + } + for (i = 0; i < count; i++) + dp[i] = tget_double(&s->gb, s->le); + for (i = 0; i < s->geotag_count; i++) { + if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) { + if (s->geotags[i].count == 0 + || s->geotags[i].offset + s->geotags[i].count > count) { + av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key); + } else { + char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", "); + if (!ap) { + av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n"); + av_freep(&dp); + return AVERROR(ENOMEM); + } + s->geotags[i].val = ap; + } + } + } + av_freep(&dp); + break; + case TIFF_GEO_ASCII_PARAMS: + pos = bytestream2_tell(&s->gb); + for (i = 0; i < s->geotag_count; i++) { + if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) { + if (s->geotags[i].count == 0 + || s->geotags[i].offset + s->geotags[i].count > count) { + av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key); + } else { + char *ap; + + bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET); + if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count) + return AVERROR_INVALIDDATA; + ap = av_malloc(s->geotags[i].count); + if (!ap) { + av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n"); + return AVERROR(ENOMEM); + } + bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count); + ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte + s->geotags[i].val = ap; + } + } + } + break; + case TIFF_ARTIST: + ADD_METADATA(count, "artist", NULL); + break; + case TIFF_COPYRIGHT: + ADD_METADATA(count, "copyright", NULL); + break; + case TIFF_DATE: + ADD_METADATA(count, "date", NULL); + break; + case TIFF_DOCUMENT_NAME: + ADD_METADATA(count, "document_name", NULL); + break; + case TIFF_HOST_COMPUTER: + ADD_METADATA(count, "computer", NULL); + break; + case TIFF_IMAGE_DESCRIPTION: + ADD_METADATA(count, "description", NULL); + break; + case TIFF_MAKE: + ADD_METADATA(count, "make", NULL); + break; + case TIFF_MODEL: + ADD_METADATA(count, "model", NULL); + break; + case TIFF_PAGE_NAME: + ADD_METADATA(count, "page_name", NULL); + break; + case TIFF_PAGE_NUMBER: + ADD_METADATA(count, "page_number", " / "); + break; + case TIFF_SOFTWARE_NAME: + ADD_METADATA(count, "software", NULL); + break; + default: + av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n", + tag, tag); + } + bytestream2_seek(&s->gb, start, SEEK_SET); + return 0; +} + +static int decode_frame(AVCodecContext *avctx, + void *data, int *got_frame, AVPacket *avpkt) +{ + TiffContext *const s = avctx->priv_data; + AVFrame *const p = data; + unsigned off; + int id, le, ret; + int i, j, entries; + int stride; + unsigned soff, ssize; + uint8_t *dst; + GetByteContext stripsizes; + GetByteContext stripdata; + + bytestream2_init(&s->gb, avpkt->data, avpkt->size); + + //parse image header + if (avpkt->size < 8) + return AVERROR_INVALIDDATA; + id = bytestream2_get_le16u(&s->gb); + if (id == 0x4949) + le = 1; + else if (id == 0x4D4D) + le = 0; + else { + av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n"); + return AVERROR_INVALIDDATA; + } + s->le = le; + // TIFF_BPP is not a required tag and defaults to 1 + s->bppcount = s->bpp = 1; + s->invert = 0; + s->compr = TIFF_RAW; + s->fill_order = 0; + free_geotags(s); + + // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number + // that further identifies the file as a TIFF file" + if (tget_short(&s->gb, le) != 42) { + av_log(avctx, AV_LOG_ERROR, + "The answer to life, universe and everything is not correct!\n"); + return AVERROR_INVALIDDATA; + } + // Reset these offsets so we can tell if they were set this frame + s->stripsizesoff = s->strippos = 0; + /* parse image file directory */ + off = tget_long(&s->gb, le); + if (off >= UINT_MAX - 14 || avpkt->size < off + 14) { + av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n"); + return AVERROR_INVALIDDATA; + } + bytestream2_seek(&s->gb, off, SEEK_SET); + entries = tget_short(&s->gb, le); + if (bytestream2_get_bytes_left(&s->gb) < entries * 12) + return AVERROR_INVALIDDATA; + for (i = 0; i < entries; i++) { + if ((ret = tiff_decode_tag(s, p)) < 0) + return ret; + } + + for (i = 0; i<s->geotag_count; i++) { + const char *keyname = get_geokey_name(s->geotags[i].key); + if (!keyname) { + av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key); + continue; + } + if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) { + av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key); + continue; + } + ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0); + if (ret<0) { + av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname); + return ret; + } + } + + if (!s->strippos && !s->stripoff) { + av_log(avctx, AV_LOG_ERROR, "Image data is missing\n"); + return AVERROR_INVALIDDATA; + } + /* now we have the data and may start decoding */ + if ((ret = init_image(s, p)) < 0) + return ret; + + if (s->strips == 1 && !s->stripsize) { + av_log(avctx, AV_LOG_WARNING, "Image data size missing\n"); + s->stripsize = avpkt->size - s->stripoff; + } + stride = p->linesize[0]; + dst = p->data[0]; + + if (s->stripsizesoff) { + if (s->stripsizesoff >= (unsigned)avpkt->size) + return AVERROR_INVALIDDATA; + bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff); + } + if (s->strippos) { + if (s->strippos >= (unsigned)avpkt->size) + return AVERROR_INVALIDDATA; + bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos); + } + + if (s->rps <= 0) { + av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps); + return AVERROR_INVALIDDATA; + } + + for (i = 0; i < s->height; i += s->rps) { + if (s->stripsizesoff) + ssize = tget(&stripsizes, s->sstype, s->le); + else + ssize = s->stripsize; + + if (s->strippos) + soff = tget(&stripdata, s->sot, s->le); + else + soff = s->stripoff; + + if (soff > avpkt->size || ssize > avpkt->size - soff) { + av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n"); + return AVERROR_INVALIDDATA; + } + if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize, + FFMIN(s->rps, s->height - i)) < 0) + break; + dst += s->rps * stride; + } + if (s->predictor == 2) { + dst = p->data[0]; + soff = s->bpp >> 3; + ssize = s->width * soff; + if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE || + s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) { + for (i = 0; i < s->height; i++) { + for (j = soff; j < ssize; j += 2) + AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff)); + dst += stride; + } + } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE || + s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) { + for (i = 0; i < s->height; i++) { + for (j = soff; j < ssize; j += 2) + AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff)); + dst += stride; + } + } else { + for (i = 0; i < s->height; i++) { + for (j = soff; j < ssize; j++) + dst[j] += dst[j - soff]; + dst += stride; + } + } + } + + if (s->invert) { + dst = p->data[0]; + for (i = 0; i < s->height; i++) { + for (j = 0; j < p->linesize[0]; j++) + dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j]; + dst += p->linesize[0]; + } + } + *got_frame = 1; + + return avpkt->size; +} + +static av_cold int tiff_init(AVCodecContext *avctx) +{ + TiffContext *s = avctx->priv_data; + + s->width = 0; + s->height = 0; + s->avctx = avctx; + ff_lzw_decode_open(&s->lzw); + ff_ccitt_unpack_init(); + + return 0; +} + +static av_cold int tiff_end(AVCodecContext *avctx) +{ + TiffContext *const s = avctx->priv_data; + + free_geotags(s); + + ff_lzw_decode_close(&s->lzw); + av_freep(&s->deinvert_buf); + return 0; +} + +AVCodec ff_tiff_decoder = { + .name = "tiff", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_TIFF, + .priv_data_size = sizeof(TiffContext), + .init = tiff_init, + .close = tiff_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("TIFF image"), +}; |